echo numeric characters ONLY in a string?

[DataTalk]

Could someone help with this?

for this line of text charactors and numbers;
Company (100)

how would I write code to echo "only numeric values";

result = 100

[DJCMBear]

Try this out.

PHP Code:

$str = "int(11)";
print preg_replace("/([^0-9]+)/","",$str); 


[kbluhm]

Or:

PHP Code:

// remove non-numeric characters
$string = preg_replace( '/\D/', '', $string ); 


[DataTalk]

Thanks DJCMBear! your suggestion worked in my example....

kbluhm: not sure how your suggestion would apply to this, and will that code remove any and all chatacters other other than numeric?

$str = $columns[Type];
$size = preg_replace("/([^0-9]+)/","",$str);
echo $size;

[DJCMBear]

Originally Posted by kbluhm

Or:

PHP Code:

// remove non-numeric characters
$string = preg_replace( '/\D/', '', $string ); 


Wouldn't it be this, saying if now digit?
As currently it looks like it's setting all digits to nothing, not 100% sure though.

PHP Code:

// remove non-numeric characters
$string = preg_replace( '/^\D/', '', $string ); 


[kbluhm]

No, that's wrong. In the above example, the ^ signifies the beginning of the string in that context, so it will remove the first character from the beginning of the string... only if is a non-digit.

\d is a digit, equivalent to [0-9]
\D is a non-digit, equivalent to [^0-9]

Just as:
\w is a word character, equivalent to [A-Za-z0-9_]
\W is a non-word character, equivalent to [^A-Za-z0-9_]
\s is a whitespace character
\S is a non-whitespace character, equivalent to [^\s]

...etc.

So, yes DataTalk, the following code will remove all non-digits from the string:

PHP Code:

$string = preg_replace( '/\D/', '', $string ); 


The original suggestion will work, I just provided a simpler alternative. Learning the ins-and-outs of PCRE will take you a long way.

[DJCMBear]

Ahhhhh sorry I missed the caps lol my bad, I get what it's doing now lol.